Gearing.



G. PAST.

BEARING. APPLIGA'TIONULBD vJUNE 1a, :1912.

Eiff. H1 9, Patented sept. 2, ma,

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Patented Sept. 2, 1913.

G. FAST.

GEARING G. PAST.

GEARING.

APPLIOATION FILED JUNE 13, 1912. l LQljlQ. Patented Sept. 2, 1913.

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' This inventior'i` relates to certain improvel f GUSTAVE Fasi?, or :Bamm/Loan, MARYLAND.

g Specification oftLetters Patent.

GEARING.

Patented Sept. 2, l 913.

' Application filed June-13, 1912. Serial No. 'i'O3,375.

Be it knownthat I, GUsrAvn FAST, of the city of Baltimore and State of B'Iarylanih have invented certain Improvements in Gearing, of which the following is a specification.

ments in what is known'asifrictional geari ing, in contradistinct'ion to gearing in which 1o rotary motion is transmitted from Ione shaft to another through' the agency of toothed wheels; .and the' object' of the present invention, in common with others'of. its class. is

.'to transmitrotation ,from one shaft to another at a reduced speed but it-,will be seen that the apparatus is also applicable lfor the attainment of a contraiv result.

The said invention, briefly stated, consists principally. in the incorporation in a trictional gearing apparatus in which rotation of the driving shaft is transmitted to the driven shaft by means of rollers and an eucircling ring. of an appliance whereby the rollers and the ring, are held together under considerable pressure, as will hereinafter fully appear. To effect this result, -I employ as an element of theapparatus, an accurately bored, and exteriorly turned nor mally resilient and practically closed coiled annulus, together with means whereby its diameter can be changed, and its resilience "temporarily.suspended ina manner hert.-

inafter described.

In an apparatus., in which the driven shaft isrot'ated by rollers having acyeloidal movement derived from a central driving shaft, and `inelosed by a fixed annplus with which they are in frictional contact, l form the Said annulus'of a ,coiled bar after the manner above briefly described, and -surround the same by a closely fitting wedgeshaped appliance which being driven longitudinally of the annulus 1n one direction.-

will reduce its diameter and thereby force the annulus tightly in contact with the-rollers, and hold the said elements together with constrictive force. I

In an alternative apparatus wherein the frictional rollers perform no .revolution around the centraldriving shaft, but only rotate on their axes, and the ring'instead of being fixed as in the former case. is rot-ated, carrying with it. the driven shaft, l secure. the coiled resilient annulus upon the central roller, and intcrpose between the said roller a-nd the annulus, a wedge-shaped appliance the shaft. diametrically expands the annulus and produces the constrictive force as in the rst case.

ln the further description of the said invention which follows, reference is made to the accompanying drawings, forming a part hereof. and in which Figure 1 is a. central longitudinal section of the apparatusl constructed as first briefly described, and in which the cycloidal anorement'ofrollers is availed of in connection with the fixed annulus to produce the desired result; and Fig. 2 is a section of the same taken on the broken line o r. Fig. 3 -is an enlarged -section taken on the broken line fw-fw in Fig. 1. Fig. 4 is a. section taken on the broken line *m' in Fig. 2. Fig. 5 is a central longitudinal section of the apparatus which illustrates the alternateconstruction in which the rollers have axial rotation only, derived from the driving shaft, and in their rotation produce the rotation of the surrounding annulus which is .practically a partof the driven shaft, and

ina -direction contrary to that of the driver;

and Fig. 6 is a section taken on the broken` line z/-y/ in Fig. 5.

Referring now to Figs. 1, 2, 3 and lof the drawings, 1 is the cylindrical casing of the apparatus, having the lugs 2 whereby it is secured to the foundation represented by the line 3. y

4 and are removable heads of the casing l, having suitable ball bearings a and for the driving and driven shafts denoted by 7 and 9 respectively.'

l() is the central or driving roller, keyed to the driving shaft T, and l2 a cage the hub of which is keyed to' the driven shaft 9.

1?). 1? are rotaryspindles in ball bearings l which are carried by, and have radial movement in the cago 12; and 14, 14 driven rollers which can be plain solid bodies like the driving roller 10, but by preference aro formed of coiled bars forming annuli which inclose the-spindles 13,'an'd aresupported which upon being driven longitudinally ot" at their ends only by the collars c of the spindles. The driven rollers are held tightly endwise by the larger collars f one of which is adjustable, vlongitudinally of its spindle and adapted to be forced inward by a. Suitable nut. The object of' constructing the driven rollers 14. in cr-il form. will be herein` after explained.

'l5 is the fixed annulus before referred to as `formed of a coiled bar. It is-bored to ,snugly it the inclosed driven rollers 14, and

`its outer surface is turned.'

17 is a sleeve cylindrically bored to receive the annulus 15, and taperingly turned eXteriorly, to present a conical surface h which is in contact with asimilar Asurface in the casing 1'. This sleeve which is cut longitudinally as shown at g in Figs. 1 and 2, to admit of its reduction in diameter, formsa circular non-rotative wedge in one piece as shown. or in sections as hereinafter de scribed, and is forced inward to effect the desired constrictive force which the annulus is to place on the driven rollers; andin order to prevent longitudinal'or"endwise ,movement of the annulusvin forcing in the wedge, the casing 1 is provided with a stopt' shown onlyzin Fig. 1. i, I l rlhe advantage in constructing the rollers "ljt of spiral form as described, oversolid ones, consists in ers, in contact with theiannulus is slightly yielding, and in consequence, a limited compensation for wear of the `ahradixrgr surfaces automatically takes place, and independently f' the circular wedge 17. 1- l As itI is desirable that adjustment of the circular wedge 17 Ashould b e effectedl without removing the head 4, 4or otherwise interferingwith the operating parts of the apparatus, I interiorly thread the portion of the 'casing` which adjoins the head 4, and place therein an externally threaded and internally toothed ring l0 the inner c ad of which abuts the larger end of the conical wedge; andv to the innerend of' a shaft 21 which is journaled in the head, is fastenedthe pinion 23' which is in mesh with the teeth ofthe sleeve.' c, Q;., l Qn the outer endliof the shaft 21.is keyed a'worm wheel 2l; anden a transversely extending and 4properly supported shaft 25 having: a suitable hand wheel, is fastened the wor1n'27 bymeans of which the worm wheel ligand the pinion 23 can: jointly be turned, to drive ,inwardA the ring ,20 and' by means of it, the circular wedge 17', and thereby close the annulus 15 uponthe rollers 14' and produce the necessary vconstrictiye pressure on the system of rollers.

From the foregoing description will be understood that the cycloidal motion of therollers 14 produces a rotation ofthe driven in the same direction as that of the driving` shaft; and that with Athe said rollers and the annulus having the relative proportions shown in the drawings, the speed of the driven will be one third. of .that-of the driving shaft. i

Referring now to Figs. 5 and of the drawings which represent-ther alternate construction of the apparatus, before referred to, it will be seen that instead of the fixed *coile'd annulus 15, and the annular wedge communicates rotation that the portion of the roll- 17 whereby it may be contracted in diameter and made to close upon and produce a desired constrictive pressure on the driven rollers 14 which have a cycloidal motion and impart rotation to the driven shaft 9; I employ an annulus forms, practically` the driving roller and to the driven rollers 13a whicliin their rotation'on their axes in a-fixed or immovable cage 12a, produce ro.- t-ation of'the ring 30 which is secured to anclgforms practically a part of the driven shaft Qn.

To admit of the diametrical distention of the coiled annulus partof the driving roller 15n there is interposed between it and the said roller, a wedge ring formed of the wedges 17zx forced inward, and held after adjustment, by means of the nuts 31 and the washer 32.

By a careful reading of the foregoing, it will appear that although the annuli 15 and 15, differ in that the annulusl is non-rotatable and adapted for closure by means of a wedge exteriorly applied thereto( and the is rotatable and adapted for dism'eans of a sectional wedge apinterior, the function of the two that of furnishinfaI force is attainable tention by plied to its devices is the same; viz: means whereby a proper to transmit rotation from driven shaft, wit-li vas little loss of power as is practicable,

I claim as my invention 1. In combination witha driving, and a driven shaft, connecting motion-transmitting mechanism which comprises a system of friction rollers and an adjustable pressureproducing` element which consists of a resilient coiled annulus, and means whereby thesaid anniilus can be changed in diameter, to force together the frictional surfaces of the mechanism, substantially as specied. 2. In combination with a driving, and a driven shaft in axial alinement, connecting motion-transmitting mechanism which includes a roller fastened to the driving shaft, a system of-driven friction rollers,` and an adj ustahlc pressure-producing element which consists of a resilient coiled annulus, and means whereby the said annulus can be altered in diameter, to force together t.he\fric tional surfaces ofthe mechanism, substantially as specified.

. 8. In combination with a driving, anda driven shaft, connect-ing fric-tional gearing which comprises as elements thereof, a roller secured to the driving shaft, surrounding rollers in frictional contact with the said-roller4 and adapted to produce rotation of the; driven shaft, a resilient coiled annulus, and-means whereby th'e said annulus can bel;.alteredin diameter to change the radial distance of the friction rollers with designated by 15a which forming practically a which can b'eV or in other words, to obtain the maximum efficiency of the apparatus.

the driving to the respect to the central roller, and thereby apply a constrictive force upon the rollers, substantially as specified.

4:. In combination With a driving, and a driven sha-ft, connecting friction-roller gearing which comprises as elements thereof, a

` central driving roller secured to the driving shaft, radially disposed frictional rollers which surround and are in contact with. the central roller, a resilient. coiled annulus` and means whereby the said annulus can be altered in diameter to apply constrictive force to the central and the radially disposed rollers, substantially as specified.

In combination with a driving, and a driven shaft, a roller fastened on the former, and a cage on the latter, rollers carried by the cage which surround and are in frictional contact with the central roller on the driving shaft, a non-rotatable resilient coiled annulus which embraces the system of rollers, and means whereby the said annulus can be diametrically reduced to apply constrictive force to the 4system of rollers, substantially as specified.

(i. ln combination with a driving, and a driven shaft, a roller fastened on the former, and a cage on the latter, rollers carried by the cage which surround and are in frietional contact with the central roller on the drivingJ shaft, a resilient coiled annulus whiehiembraccs the rollers carried by the cage, a cylindrically bored annular and contractible wedge which surrounds the said annulus, and means for forcing inward the annular Wedge to reduce the diameter of the annulus and thereby apply constrietive force to the system of rollers, substantially as specified.

7. In combination with a driving, and a driven shaft in axial alinement, a roller secured on the former, a rigidly attached Jcage on the latter, a system of rotary spindles having collars thereon, which spindles are carried by the cage, rollers upon the spindles which are formed of resilient coils supported at their ends only by the said collars, a resilient coiled annulus which surrounds the coiled rollers, and means to contract the diameter of the said annulus and so force the coiled rollers against the central roller on the driving shaft, substantially as specilied.

driven shaft, in axial alincment, a roller secured on the former, and a rigidly attached:I

cage on the latter, a-system of rotary` spindles. which surround the central roller and are journaled in the cage, rollers upon the spindles, which are formed of resilient coils and are supported by the spindles at their ends only, a resilient coiled annulus which surrounds the coiled rollers, an annular contractible wedge to reduce the diameter of the said annulus and thereby bind the coiled rollers acainst the central roller on the driving shait, and means to force inward the said wedge, substantially as specified.

9. In combination wi-th a driving, and a driven shaft, in axial alinement, i roller secured on the former, and a cage which is secured on the latter, a syst in of rotary spindles having collars thereon, carried by the cage, rollers upon the spindles which are formed of resilient coils supported at their ends only by the said collars, a resilient coiled annulus which surrounds the coiled rollers, and hand operated means to contract the diameter of the said annulusY and thereby force the coiled rollers against the central roller on the driving shaft, substantially as specified.

l0. ln combination with the cylindrical casing of a frietional driving apparatus, a driving, and a driven shaft in axial alinement, a roller secured to the former, vand a cage which is carried by the latter, a system of rotary spindles disposed around the driving roller and iournaled in the cage, and rollers upon the spindles which are formed of resilient coils supported at their ends only by the spindles, combined with a resilient coiled annulus which surrounds the lcoiled rollers, an annular contractible wedge VM. T. HOWARD, JULIA B. ROBINSON. 

